VTK/Examples/Java/Miscellaneous/Screenshot

import vtk.*;
 
public class Screenshot
{
 
  static
  {
    System.loadLibrary("vtkCommonJava");
    System.loadLibrary("vtkFilteringJava");
    System.loadLibrary("vtkIOJava");
    System.loadLibrary("vtkImagingJava");
    System.loadLibrary("vtkGraphicsJava");
    System.loadLibrary("vtkRenderingJava");
  }
 
  public static void main(String[] args)
  {
    vtkSphereSource sphereSource = new vtkSphereSource();
    sphereSource.SetCenter(0.0, 0.0, 0.0);
    sphereSource.SetRadius(5.0);
 
    //create a mapper
    vtkPolyDataMapper mapper = new vtkPolyDataMapper();
    mapper.SetInputConnection(sphereSource.GetOutputPort());
 
    // create an actor
    vtkActor actor = new vtkActor();
    actor.SetMapper(mapper);
 
    // a renderer and render window
    vtkRenderer renderer = new vtkRenderer();
    vtkRenderWindow renderWindow = new vtkRenderWindow();
    renderWindow.AddRenderer(renderer);
 
    // an interactor
    vtkRenderWindowInteractor renderWindowInteractor = new vtkRenderWindowInteractor();
    renderWindowInteractor.SetRenderWindow(renderWindow);
 
    // add the actors to the scene
    renderer.AddActor(actor);
    renderer.SetBackground(1,1,1); // Background color white
 
    renderWindow.Render();
 
    vtkWindowToImageFilter windowToImageFilter = new vtkWindowToImageFilter();
    windowToImageFilter.SetInput(renderWindow);
    windowToImageFilter.SetMagnification(3); //set the resolution of the output image
    windowToImageFilter.Update();
 
    vtkPNGWriter writer = new vtkPNGWriter();
    writer.SetFileName("screenshot2.png");
    writer.SetInput(windowToImageFilter.GetOutput());
    writer.Write();
 
    renderWindow.Render();  
    renderer.ResetCamera();
    renderWindow.Render();
    renderWindowInteractor.Start();
  }
}